MC33742SPEGR2

Overview

The MC33742SPEGR2 is a System Basis Chip (SBC) integrating an enhanced high-speed CAN transceiver and power management functions for automotive electronic control units. It features a fully protected fixed 5.0 V low dropout regulator with current limiting, overtemperature prewarning, and reset capabilities. A second 5.0 V regulator can be implemented using an external pass transistor driven by the SBC's V2 sense input and output drive pins. The device supports four main operating modes: Normal, Standby, Stop, and Sleep mode. Additionally, it includes an internally switched high side power supply output, four wake-up input pins, a programmable window watchdog, interrupt, reset, and a SPI module for communication and control.

Feature Summary

• Integrates a high-speed CAN transceiver with bus diagnostic capability
• Features SPI control interface supporting frequencies up to 4.0 MHz
• Includes a fully protected 5.0 V low dropout voltage regulator with current limiting and over-temperature prewarning
• Supports implementation of a second 5.0 V regulator using an external series pass transistor

Applications

• Automotive electronic control units (ECUs)
• CAN 2.0-compliant intermodule communication systems
• Power management in vehicle networks requiring multiple voltage regulators

Procurement Notes

Verify the specific suffix 'EG' indicates lead-free packaging and 'R2' denotes reel tape-and-reel packaging configuration. Confirm the 'S' designation corresponds to the 3.5 ms typical reset duration variant rather than the standard 15 ms version. Ensure compatibility with the required 48-pin QFN package dimensions and thermal characteristics for your PCB layout.

Selection Notes

Select this component when a system basis chip combining CAN transceiver functionality with dual voltage regulation is required. The MC33742S variant offers a shorter reset duration compared to the standard MC33742. Consider the 48-pin QFN package for space-constrained designs requiring efficient thermal dissipation through the exposed pad.

Part Context

This part belongs to the MC33742 family of System Basis Chips from NXP Semiconductors (formerly Freescale). The family includes variants like the MC33742PEG and MC33742PEP, differing primarily in package type and reset duration characteristics. The MC33742S specifically denotes the version with a 3.5 ms typical reset duration.

Replacement Considerations

MC33742PEG/R2

FAQ

What is the difference between the MC33742 and MC33742S regarding reset duration?

The MC33742 has a typical reset duration of 15 ms, while the MC33742S has a typical reset duration of 3.5 ms when entering Reset mode after power-up or under-voltage detection.

How is the second 5.0 V regulator implemented on the MC33742SPEGR2?

The second 5.0 V regulator is implemented using an external series pass PNP bipolar junction transistor, which is driven by the SBC’s external V2 sense input and V2 output drive pins.

What are the main operating modes supported by the MC33742SPEGR2?

The device supports four main operating modes: Normal, Standby, Stop, and Sleep mode, allowing for flexible power management strategies in automotive applications.